Fig. 3.

Test of attentional performance—subtest flexibility. Comparison of response times in milliseconds between the three investigated groups at baseline, operating with surgical mask, and operating with FFP2 mask in the test results. A Flexibility reaction time, B standard deviation of Flexibility reaction time. C Comparison of number of errors made during performance of the test. D Comparison of the standardized T-Score between the three investigated groups according to the flexibility speed–accuracy index